Copying-press with pressing-levers arranged symmetrically to one another.



K. LENGK. COPYING PRESS WITH PRESSING LEVERS ARRANGED SYMMETRIGALLY TOONE ANOTHER.

APPLIOATION FILED MAR.30, 1908.

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K. LENCK.

COPYING PRESS WITH PRESSING LEVERS ARRANGED S-YMMETRIGALLY T0 ONEANOTHER.

APPLICATION FILED MAR.30,190B.

Patented Mar. 30, 1909.

3 SHEETS-SHEET 2.

Lvenfom K. LENGK.

COPYING PRESSWITH PRESSING LEVERS ARRANGBD SYMMETRICALLY T0 ONEANOTHER.'

' APPLIOATION FILED MAB.so.19oa.

91 6,73. 'Patented Mar. 30, 1909.

3 SHEETS-SHEET 3.

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FICE.

KARL LENGK, OF BERLIN, GERMANY.

COPYING-PRESS WITH. PRESSING-LEVERS ARRANGED SYMMETRICALLY TO ONEANOTHER.

To all 'whom it may concern.'

Beit known that I, KARL LENCK, a subject of the German Emperor, andresident o1" 154 Friedrichstrasse, Berlin, N. W. 7, Germany, haveinvented certain new and usel'ul Improvements in Copyingelresses withPressing-Levers Arranged Symmetrically to One Another, of which thefollowing is a specification.

In the copying pressesalready known and having eccentric levers theeccentric pressure acts either directly on certain points in thepressing plates, or the eccentric levers press down springs which inturn transmit their force oi' pressure to certain points in the pressingplates. Hereby however a good copy is only obtained in the places wherethe pressure is applied, while in consequence of insufficient pressurethe remaining portions yoi` the copy are indistinct or are not visibleat all. This disadvantage is obviated by the present invention, as whenthe eccentric levers are turned over the pressure is transmitteduniformly from the middle toward both sides, the springs beingcontinuously pressed against the pressing plate. The eccentric leverscan moreover be suitably adjusted for books oi' different thickness.This however is not eiTeoted as heretofore by screwing up the pressinglever bearings higher or lower by catches, but by placing the pressinglevers in certain lugs adapted to the current thickness ofthe books.

In the accompanying drawing, in which I have illustrated my inventionlike numerals oi' reference refer to like parts throughout the differentviews.

In said drawings, Figure 1 shows an elevae tion of my improved eccentricpress. shows a plan-view ol' Fig. 1. Figs. 3-9 show a modiiied form oi'construction ot' my improved eccentric press.

In Figs. land 2 of the drawing the lower pressing'plate is indicated as1, the upper pressing plate as 2. Between the two is the space for thecopying book, which is compressed by forcing the pressing plates one toward the other. The tension rods 3 which are bent to a U shape embracethe pressing plates so that the lower plate lies 'lirmly therein, whilethe u per plate can be easily raised and lowered llietween the arms ofthe bent rods. `The relative positions of the plates and rods ismaintained in the simplest manner by forcing grooves in the sides of theSpecification of Letters Patent.

Application filed March 30, 1908.

Fig. 2 l

Patented March 30, 1909.

Serial N 0. 424,106.

pressing plates into which the arms of the rods engage. The free ends ofthe tension rods are bent to form eyes 4 which serve as bearings for theeccentric levers. On the upper pressing plate 2 are iixed pressuredistributing springs 5 consisting of rods which are suitably bent attheir ends to lorm elongated eyes or lugs. In order to move the pressingplates one against the other it is thus only necessary to lower thepressing springs 5 in relation to the tension levers 3, this beingeffected in a simple manner by the eccentric levers 7. Each of theselevers is bent to a U shape while the part joining the two arms oi' theU is bent upward to enable it to be conveniently held by the hand. Eachof the two free ends is bent three times at right angles so that twocranks which stand apart are produced. One crank engages the eye 6 andthe other the eye 4. By turning the lever over inward on to the pressingplate 2 the eye 6 is lowered to double the extent of the distancebetween the two bearing pins oll the eccentric levers 7. By suitablybending these levers any desired pressure can be applied in the press.The bend is moreover so arranged that after touching the pressing platethe levers 7 remain stationary, that is in the position shown in thedrawing in full lines, and so likewise after they have been ut backoutward and downward. In the atter position the pressing springs 5 andthe levers 7 are stationary in relation to one an-V otherso that theyform a convenient support for the copying book. The lever 7 musttherefore stand somewhat higher than is shown in the drawing (Fig. 1).This position is determined by the length of the eyes 6, within whichthe inner crank bearing of the eccentric lever slides to and fro. Thepressing springs 5 are suitably iiXed in the middle on the upperpressing late 2, in order that the pressure may be distributed uniformlyover the copying surfaces.

In the modiiied form of construction shown in Figs. 3 and 5 of thedrawing band springs 8 are arranged instead of the springs 5, for thepurpose of obtaining a more powerful aressure, articular-ly for thickcopying books. The iiigs 9 in the band springs can be produced by simplybending the band springs. In order to enable the press to be used for anumber of book thicknesses it is only necessary to seat the cranks ofthe levers 7 higher or lower. Such a variable seating can be obtained bybending the free ends of the tension rods s0 as to forni not one eye orlug but a number of eyes or lugs. By coinpressing the bent levers 7 theouter bearing pins are removed from the lugs 4. Hereupon the lever 7 maybe raised somewhat higher up to the second lug 10 and is then released,so that the pins catch in these upper lugs. The pressing plate 2 withthe springs 8 is thereby put out of the position indicated by dottedlines into that indicated by full lines (Fig. 3). if the difference inthe thickness of the books is only slight, it is only necessary to turnthe free wire ends of the tension levers 3 over the lugs in the mannershown in Figs. 5 and 6. lf the lug is to be higher a new lug is formedby turning the wire around completely to the desired height.

The details of the press may vary considerably in construction. Forexample (see Figs 7-9) the pressing plates 1 and 2 can be dispensed withby bending a pressing plate 11 laterally and forming it above with lugs12 at the ends, so that the tension rods 3 are also unnecessary. Theupper pressing plate may likewise be replaced by a plate 13 which at thesame time renders the springs superiiuous, as it is furnished with lugs14.

What l claim as new and desire to secure by a United States LettersPatent is :M

In a copying press the combination of two press plates, rods connectedto the lower press plate and having eyelets in their free ends, curvedsprings resting with their center part on the center part of the upperpress plate, and eccentric levers in the eyelets and adapted to depressthe ends of the springs.

in testimony whereof l have hereunto signed my name this 2O day of March1908, in the presence of two subscribing witnesses.

KARL LENOK. Witnesses:

NOLDEMAR HAUPT, HENRY HASPER.

